Adam Levine, lead singer of American pop rock band Maroon 5, and wife Victoria's Secret model Behati Prinsloo, are hit by reports that their marriage is in trouble.

According to In Touch magazine, the Namibian model is allegedly getting jealous over the 36-year-old The Voice judge's flirtatious behaviour.

"Adam's acting like the same playboy he was before they wed [go married], and that's a problem for his wife," an insider said, according to Hollywood Life. "She thinks it's disrespectful for him to flirt with other girls when he's married to her."

"He goes out all the time and hangs out with other models," the source continued. "Recently, Adam had a guys' night out and Behati found out he was chatting up girls. She was livid and they had a huge fight. It's a sore spot for her."

Levine and Prinsloo started dating in June 2012. Following a brief split, they got back and announced their engagement in July 2013.

Last year in July, the couple tied the knot at Flora Farms in Cabo San Lucas, Mexico.

"She never wanted to be that nagging wife, but now she is, constantly calling or texting Adam to see where he's at. It's driving him crazy—and pushing him further away," the insider added. "He promised Behati that after they got married, things would change—and they haven't."

Despite the break-up rumours, the Moves Like Jagger singer and Prinsloo have not shown any signs of strain in their relationship, and have been sharing photos and videos of them spending time together on social media accounts.

Adam Levine and Behati Prinsloo started dating in June 2012. Following a brief split, they got back and announced their engagement in July 2013.Adam Levine Instagram

Adam Levine and Behati Prinsloo tied the knot at Flora Farms in Cabo San Lucas, Mexico, last year in July.Behati Prinsloo Instagram